platform driver: fix use-after-free in platform_device_del()

In platform_device_del(), the device is still used after a call to
device_del(). At this point there is no guarantee that the device is
still there and there could be a use-after-free access. Move the
call to device_remove_properties() before device_del() to fix that.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 6482d47..f57fff3 100644 (file)
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -434,6 +434,7 @@ void platform_device_del(struct platform_device *pdev)
        int i;
 
        if (pdev) {
+               device_remove_properties(&pdev->dev);
                device_del(&pdev->dev);
 
                if (pdev->id_auto) {
@@ -446,8 +447,6 @@ void platform_device_del(struct platform_device *pdev)
                        if (r->parent)
                                release_resource(r);
                }
-
-               device_remove_properties(&pdev->dev);
        }
 }
 EXPORT_SYMBOL_GPL(platform_device_del);